1 /* C11 threads mutex initialization implementation.
2 Copyright (C) 2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
21 #include "thrd_priv.h"
24 mtx_init (mtx_t
*mutex
, int type
)
26 _Static_assert (sizeof (mtx_t
) == sizeof (pthread_mutex_t
),
27 "sizeof (mtx_t) != sizeof (pthread_mutex_t)");
28 _Static_assert (alignof (mtx_t
) == alignof (pthread_mutex_t
),
29 "alignof (mtx_t) != alignof (pthread_mutex_t)");
31 pthread_mutexattr_t attr
;
33 __pthread_mutexattr_init (&attr
);
35 /* Another possible solution would be to set the flags directly in
39 case mtx_plain
| mtx_recursive
:
40 case mtx_timed
| mtx_recursive
:
41 __pthread_mutexattr_settype (&attr
, PTHREAD_MUTEX_RECURSIVE
);
44 case mtx_timed
: /* No difference between both in standard */
46 __pthread_mutexattr_settype (&attr
, PTHREAD_MUTEX_NORMAL
);
50 int err_code
= __pthread_mutex_init ((pthread_mutex_t
*) mutex
, &attr
);
51 /* pthread_mutexattr_destroy implementation is a noop. */
52 return thrd_err_map (err_code
);